HP 3000 Manuals HP 3000 Manuals
The return Statement
The return statement causes a return from a function.
Syntax
return [expression];
Description
When a return statement is executed, the current function is terminated
and control passes back to the calling function. In addition, all memory
previously allocated to automatic variables is considered unused and may
be allocated for other purposes.
If an expression follows the return keyword, the value of the expression
is implicitly cast to match the type of the function in which the return
statement appears. If the type of the function is void, no expression
may follow the return statement.
A given function may have as many return statements as necessary. Each
may (or may not) have an expression, as required. Note that the C
language does not require that return statements have expressions even if
the function type is not void. If a calling program expects a value and
a function does not return one (that is, a return statement has no
expression), the value returned is undefined.
Reaching the final } character of a function without encountering a
return is equivalent to executing a return statement with no expression.